Improvement in distilling turpentine



linitrd tatrs DAVID CASHWELL, 4OFWILllLIINGrTON, NORTH CAROLIN A.

Letters Patent No. 102,7 7 4, Zatcd .i1-[ay 10, 1870.

IMPROVEMENT'IN DISTILLING TURPENTINE.

The Schedule referred to in these Letters Patent an making part of the saune.

To lwhom it may concern:

Be it known that I, DAVID GAsHWELL, of Wilmington, in the county of New Hanover and State of North Carolina, have invented certain Improvements in Stills for Distilling Crude Turpentine, and producing therefrom spirits of turpentine and rosin, of' which the following is a specification.

In the drawings- Figure 1 is a view of the top of the still;

Figure 2 is an upright view of the same;

Figure 3 is an upright. sectional view of the still and ues;

Figure 4 is a horizontal section, showingT the lines and dampers; and 1- Fgure' is an upright section, showing the direction of the products of com bustiona The object of this yinventionvv is to construct a still and manipulate and control the operation of'distilling turpentine in 'a more thorough and complete manner, and obtain a better quality of spiritand Vrosin from the crude material than has been done bythe process here-l Itofore used; and A It consists in the construction of the ues that conduct the products ofoinbustionand heat from the furnace in contact with the still, the means used for controlling the heat and prolongingits path in contact with the still, and in the means of ascertaining the precise condition and of keeping under perfect control the material in the'still.

A represents the brick-work that surrounds and supports the still B.

B is the usual-sheet-metal still, having the bottom B made convex in form, with the discharge-pipe and nozzle F through the side at the Atop of the bottoni plate of the still, and has the equal aperture B" at thecrown, for the escape of the spirits, when in a Volatile or gaseous state,into the ordinary receiving-tube or pipe, terminating lin the usual or any condensing apparatus.

A metal cylinder, e, is inserted in thc breast of the still, extending down to within about three inches of a level with top of tine D, in which isv the oat f', which works freely up and down in said cylinder c, to which float f'is attached a graduated stem or rod, f, extending upward and above the easing of the still.

C is the usual grate-space underneath the still. v From this grate-space the flame or products of combustion come directly in contact with the bottom B of the still, and arethen deflected through thc small apertures c c o into a horizontal flame-line, D, which encircles the still, and is led oi into line E of chimney E. a is a sliding damper in ue D, where the flame turns vt-o enter chimney E, and, if damper a is forced inward and closes theflueD, thc'l'lame and products of combustion pass upward through 'an upright ilue, yH, in the easing A, into an upper horizontal tlue, which is directly over'and is separated from flue 1 by partition o.

ulate the draught through said flue D when damper a. is closed in tine D.-

Grv is a funnel, through which water is fed into the still.

The still B is charged in the usual way with crude turpentinc or yellow dip, and the condensing apparatus attached to the cap as usual. drawn, giving a direct draught through flue D into flue E, when the fire is applied in the grate or-furnaee; as the fire burns'and thc'tlame heats the bottom of the still, and thereby the contents of the still, up to the point of ebullition, thc spirits are evolved and separated from the crude material, and, being in a volatile state, pass up through aperture B" into the conducting-pipe of the condensing apparatus.

liquidized, by reason'I of the heat in flue D being applied directly at that point on the outside of the still, which. facilitates the evolving of the spirits, and, by

fhaviug a constant flow of a sufiicient supply of waterthrough the funnel G, the turpentine or rosin is kept at a uniform height in the still, and above ,the top of the material, turpentine or rosin, must be kept above' the t-op of the upper iue D' by a sufficiency of water to prevent excess of heat, so that there will be no danger of discoloring either the spirits or the rosin.

In order to keep the llame in flue D supplied with the necessary amount of oxygen, small openings, dtl d, are made' through the brick casing into the ilue D', through which openings the outside air can freely pass into the flue, and supply the demand. Y

extracted from the crude material, and the rosin is and damper b closed', cutting oil' the flame "from flue D', causing it to vgo direct to the chimney from ue itated, the lire kept up only to evaporate thewater ing-pipe arc removed 'from the aperture B", thc rosin drawn off through pipe F in the usual way, and the still is ready for another charge.

By theapplieation of the upper return iiue- D' and turpentine can be worked inthe same-sized still than has heretofore becudoue without such additional ue;

b is a sliding damper in tine D', and is used to reg- Damper a is with-- iVhen the turpcntine rises in the still above the top l of the upper dame-flue D', as will be indicated by the graduated stem' of oatf, then the damper b is opened per flue D', the crude turpentine iu 'the still becomes.

the upper flue 1)', and is thus secured from the liability to become scorched or diseolored by Atoo much lie 'a t",`;" as can he known by the graduated stem f of the fiori-t" f for, when the damper@ is eloscdaud damper b opeiff Vhen it is ascertained that all the spirits have been properly formed, the damper a is opened orwithdrawn D, the-'water-feed is stopped, and therosn precipfrom the rosin. When complete, the cap and conduca i damper b in the manner' described, much more crude the spirits thus obtained are colorless and the rosin much lighter in color; the operation is so controlled as to keep the contents of the still at just the temperai ture to produce the best results and prevent the dantive ebullition, above the upper dame-flue D', in the manner and foi the p urpose set forth.

2. The combination of the dame-flue D, damper a, upper ue D', and damper b, with the still B, in the manner and for the purpose described.

3. The combina-tion of the ue D' and damper b with the air-openings d cl, in the manner and for the purpose described.

4. The combination of the oatf and graduated rod f with the still B, when the fioat is constructed to operate in the manner and for the purposes described.

- DAVID GASHWELL.

Witnesses:

WM. LARKINS, A. GILBERT. 

